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Finding the Fourth Proportional to 408,086.10, 612,129.15 and 370,688.40

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Solution

The fourth proportional to 408,086.10, 612,129.15 and 370,688.40 is: 556,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,086.10 : 612,129.15 = 370,688.40 : x
  2. Step 2: Convert to fraction form
    408,086.10/612,129.15 = 370,688.40/x
  3. Step 3: Cross multiply
    408,086.10x = 612,129.15 × 370,688.40
  4. Step 4: Simplify right side
    408,086.10x = 226,909,175,206.86
  5. Step 5: Solve for x
    x = 226,909,175,206.86/408,086.10
  6. Step 6: Final answer
    x = 556,032.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.